Slug-trimmer.



F. J. IVIATYCH.

SLUG TRIMMER.

APPLICATION man NOV. 5, 1914.

Patented Dec. 21, 1915.

f N AWN/x i W COLUMBIA PLANOGRAPH (10.. WASHINGTON, D. c.

@FFFUFZ.

FREDERICK J. MATYGH, OF NEl/V YORK, N. Y.

SLUG-TRIMMER.

Application filed. November 5, 1914.

To all lU/LOWL it may concern Be it known that I, FREDERICK J. MA- TYCH, a citizen of the United States, residing at New York, in the county of New dfork and State of New York, have inthe provision of a machine of the character noted which is simple in construction and effective in operation and by which accurate and precise trimming of work can be obtained.

The device involves other features of novelty and utility, which with the foregoing will be stated at length in the following description, wherein I will set forth in detail that one of the several advantageous forms of embodiment of the invention which I have selected for illustration in the drawings accompanying and forming part of the present specification. I do not restrict myself to this showing; I may depart there from in several respects within the scope of the invention defined by the claims following said description.

Referring to said drawings: Figure 1 is a top plan view with parts broken away, of a slug trimmer involving my invention, a portion of the operating handle being removed. Figs. 2, 3 and 4 are central sectional side elevations of the machine, shou ing the movable parts in three different positions. Fig. 5 is a front elevation of portion of said machine. Fig. 6 is a perspective view of one corner of the movable blade. Fig. 7 is a detail. view showing a piece of work trimmed.

Like characters refer to like parts throughout the several figures.

As will be inferred from what I have already observed a machine comprising my invention can be used in a variety of connections. The machine shown involves in its construction a base or bed as 2 provided at its forward end with laterally extending arms and 4, the base, therefore, being approximately of T shape and said arms with the front end of the body of the base Specification of Letters Patent.

. concluded.

Patented Dec. $1, I915.

Serial No. 870,506.

presenting a convenient support for the w rk to be trimmed, of whatever nature the same may be. In practice it is customary to fasten the machine rigidly to some suit able structure such as a table, and screws not shown) may be provided for this purpose, the arms 3 and 4- having perforations 5 and 6 respectively to receive the screws. The work support as I have termed it, is provided with a vertical, elongated projection 7, having its upper edge the aperture or opening 8, the end walls of said aperture or opening being at right angles to the bottom thereof for a purpose that will hereinafter appear. In the present instance said projection 7 is integral with the base 2; for example they may be cast in one, although this is not an elemental consideration. This projection 7 constitutes a carrier or an abutment for the part 9 which as shown. extends the complete length of the transversely widened front end of the base 2, the part 9 as shown, being fastened for instance by screws 10, to the inner flat surface of the projection 7. This part 5) acts as a fixed blade, anvil or jaw, the work as will hereinafter appear, being clamped against the same. In the upper edge of the blade or jaw 9 is an aperture 11 which coincides or mates with the opening 8; that is to say, the bottom and the end walls of the opening 11 are in exact coincidence with the corresponding portions of the opening 8. I prefer to clamp or grip the work while it is being trimmed as in this way the work cannot move at such time; as a consequence I can obtain a proper cut. In the present instance the work is clamped before the cutting operation commences. that at the inception of such latter action, there is no possibility of the work being moved, the clamping relation preferably continuing until the cut is fully The part 9 as will. be under stood, performs a function in the clamp ing of the work, constituting the fixed jaw of the clamping means.

The movable jaw is denoted by 12 and it has in its upper edge an aperture 13 which registers with the apertures 8 and 11. The aperture 13, however, is for the passage of a movable cutting blade as will hereinafter appear. The movable jaw 12 is parallel with but is not as long as the fixed jaw 9,

being rigid for instance by being cast with the body 14 which with the jaw 12 is at its rear and approximately centrally thereof has anopen slot 17, the purpose of which will be hereinafter explained.

The movable cutter or blade is denoted in a general way by 18 and will hereinafter be more particularly described, although I -might say in passing that said blade is connected with the shank 19 situated above the body 14, the upper flat face of the shank 19 having a flatwise bearing against the under side of the cap plate 15. The shank 19 as shown, is provided with similar depending projections 20 located in the parallel slots 21, respectively, of the body 14, the springs 22 being. situated in said slots. The forward ends of the springs 22 bear against the front walls of said slots 21 and also against the projections 20. The cutting portion of the main cutter 18, is situated initially or when the parts are at rest, back of the jaw 12.

It will be assumed that the shank 19 and hence the cutter or blade 18, is advanced. As the shank 19 is moved forward or toward the left in Figs. 2, 3 and 4: the projections 20 acting against the springs 22, yieldingly move the aw 12 toward the companion aw 9, so that the work, positioned between the two jaws can be clamped, the construction being such that the work is solidly yet yieldingly engaged before the trimming operation. As will hereinafter also appear the work will remain in clamped condition until the movable cutter 18 has passed. entirely free of the same, the spring means, consisting of the two springs 22, holding during this time the movable jaw 12 against the work, this relation in fact being maintained but with gradually decreasing efiect until the movable blade 18 has practically reached its primary position.

The shank 19 has a slot 28 at opposite sides of which are rack teeth 24 while at opposite sides of the slot 17 are rack teeth 25, the two sets of teeth 24 presenting what might be considered as a divided movable rack, while the two sets of teeth 25 constitute a fixed rack, and being in mesh with the teeth of the bodily-movable pinion 26 which extends from practically one side wall or flange 16 to the other. As will be inferred the pinion 26 rolls and does not move about a stationary axis, by reason of which I can obtain a greater amount of movement of the shank 19 and blade 18 on the movement of the pinion 26 than I could were I to turn said pinion about a fixed axis. For rotating the pinion 26 any desirable means may be provided, the arm 27 being shown for this purpose, said arm having at its inner end the hub or ring 28 to encircle the pinion 26 between the ends thereof. As shown the hub or ring 28 is held in place by a screw 28 carried thereby and adapted to enter a space between two adjacent teeth of said pinion, the two mating slots 17 and 23 being adapted to receive said hub or ring 28. The cover plate 15 has a similar slot 29 to receive said arm 27 on the operative movement thereof, said arm being shown in its backward position in F ig. 2 and in successive advanced positions in Figs. 3 and s having practically completed its forward stroke in the last mentioned view.

lVithout describing in detail the construction of the blade or cutter 18 at this time, it will be assumed that a piece of work is positioned between the fixed jaw or blade 9 and the movable jaw 12, the lever or arm 27 at this time being in its retracted position or that shown in Fig. 2. With the parts in this relation, the lever 27 will he swung forward to cause the pinion 2G to roll along the rack teeth 25 and thereby acting against the rack teeth 21- to advance the shank 19 whereby the projections or studs 20 by pressing against the springs 22 will force the jaw 12 toward and into clamping engagement with the work, the latter being rigidly gripped before any part of the blade or cutter 18 touches the work. On the continuation of the movement or as the lever or arm 27 moves successively to the positions shown in Figs. 3 and 4: respectively. the blade or cutter is projected through the work. After the blade 18 has exercised its function, return movement is imparted to the lever 27 to restore it to its primary position shown. in said Fig. 2, by virtue of .which the shank 19 and blade 18 are moved backward but as I have already stated the jaw 12 will not release the work until the blade or cutter 18 has virtually reached its normal position.

The movable blade, cutter or knife 18 has a main cutting edge of suitable kind at its front. formed as shown by two like forwardly-converging cutting portions 30. The main cutting portion of said blade 18 therefore is approximately of \l-shape. In addition to this main cutting portion there are auxiliary cutting portions 31 precisely alike in form except that they are oppositely disposed with regard to their angles. The main cutting portion of the blade or knife 18 makes a longitudinal cut through the work while the auxiliary portions 31 make a lateral or transverse cut, the two types of cuts in the present instance, being substantially at or near at exact right angles to each other.

It will be obvious that I do not restrict myself to the exact shape of movable knife 1 or cutter, the primary consideration being to make two meeting cuts at virtually right angles to each other thereby to give the work a finished, clean appearance, without the presence of burs or other objectionable protrusions. I should also callattention to the fact that I have shown the movable cut ter with NO main cutting portions and two auxiliary cutting portions solely as a matter of convenience and further to increase the effectiveness or output of the machine; there are cases where the movable cutter would work just as satisfactorily wherein the cutting portions are not duplicated, the essential point being to obtain a right angular cut but not necessarily two of them as shown. The auxiliary cutting portions 31 are in the nature of extensions from opposite sides of the blade 18, the upper and outer surfaces of said cutting portions 31 being in the planes of the corresponding portions of said shank. In shape these auxiliary cutting portions 31 are of V-form longitudinally and cross sectionally being pointed at their forward ends and their cut ting edges 32 being upon a decidedly acute angle to the tops thereof, so that the cutting edges 32 enter the stock practically perpendicularly, in making the lateral cuts therein, said lateral cuts being at right angles to the longitudinal cuts. That is to say each cutting edge 32 commences to make its shearing cut in the upper edge of the stock and cuts downward and slightly forward into said stock until the completion of the lateral cut. The inner ends of the cutting edges 32 merge into the cutting edges 30. As will be understood the blade 18 including the extensions 31 is projected through the stock or work clamped jointly by the jaws 9 and 12.

The movable jaw 9 is provided with adjustable stops as 33 shown as consisting of pins and against which the ends of the work is abutted, these stops 33 being adapted to interchangebly fit series of perforations as 3% arranged in staggered order in the jaw 9 near opposite ends thereof. Each series of perforations as will be understood has two rows, the perforations of each row being separated a pica. apart. It will, therefore be clear that the distance between each perforation of an upper row and an adjacent perforation of a lower row is a halfpica, so that I providefor half pica adjustments. As a matter of convenience the perforations of the upper row of each series will bear suitable indicating marks such as the numbers 6, 8, etc. It is not necessary for me to mark all the perforations but merely as illustrated some of them, for the operator I can readily make his calculations in this manner. Prior to trimming a piece of work the adjustable steps 38 are positioned as required and the work is placed between the jaws 9 and 12 with one end thereof against one of the stops or pins after which the lever or arm 27 is manipulated in the man ner described to ii st grip and then cut the work.

What I claim is 1. A slug trimming blade having a main cutting portion and an auxiliary cutting portion extending from the main cutting portion, the auxiliary cutting portion being longitudinally and cross sectionally of V- form to produce a cutting edge, the cutting edge ofthe auxiliary aortion merging into the cutting edge of the main cutting portion and the two being approximately at right angles to each other.

A slug trimmingblade having a main cutting portion and an auxiliary cutting portion, one lateral part and one edge part of the auxiliary cutting portion being both inclined to present a cutting edge, said cutting edge merging into the cutting edge of the main cutting portion.

3. A slug trimming blade having a main cutting portion and an auxiliary cutting portion extending forwardly from the main cutting portion, the upper and outer side faces of the auxiliary cutting portion being in the same planes with the corresponding parts of the main cutting portion, the auxiliary cutting portion being longitudinally and cross sectionally of if-form to produce a cutting edge, the cutting edge of the auxiliary portion merging into the cutting edge of the main cutting portion and the two being at approximately right angles to each other, the cutting edge of the auxiliary portion being at an acute angle to the upper surface thereof.

at. A slug trimming blade having a main cutting portion and an auxiliary cutting portion, the auxiliary cutting portion extending forwardly from the main cutting portion and the cutting edges of the two merging into each other.

A slug trimming blade having a main cutting portion and an auxiliary cutting portion, the auxiliary cutting portion extending forwardly from the main cutting portion and being pointed, the cutting edge of the auxiliary cutting portion extending downwardly and inwardly at an angle and and movable aws constituting a slug clamp, a blade movable to cut the stock gripped by the elamp, means for advancing said blade, the shank of the blade having a stud, and

5 spring means bearing against the movable jaW and the stud respectively, the movable jaw being normally located between the bladeand the stationary jaw.

8. A slug trimmer comprising a clamp 10 having stationary and movable jaws, both I 'aws of the clam) bein a ertured a movable blade projectable through the apertures of the two jaws, the movable jaw constitutmg a cutting blade and being situated between the movable blade and the stationary l5 jaw.

In testimony whereof I ailix my signature in presence of two witnesses.

FREDERICK J. MA'LYCH. lVitnesses L. L. MARKEL, HEATH SUTHERLAND.

7 Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patent.

' Washington, D. C. 

